2009 BMW 320 vs. 2012 BMW 550
To start off, 2012 BMW 550 is newer by 3 year(s). Which means there will be less support and parts availability for 2009 BMW 320. In addition, the cost of maintenance, including insurance, on 2009 BMW 320 would be higher. At 4,400 cc (8 cylinders), 2012 BMW 550 is equipped with a bigger engine. In terms of performance, 2012 BMW 550 (400 HP @ 5500 RPM) has 252 more horse power than 2009 BMW 320. (148 HP @ 4000 RPM) In normal driving conditions, 2012 BMW 550 should accelerate faster than 2009 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2012 BMW 550 weights approximately 400 kg more than 2009 BMW 320. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2012 BMW 550 (609 Nm @ 1750 RPM) has 278 more torque (in Nm) than 2009 BMW 320. (331 Nm @ 2000 RPM). This means 2012 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW 320.
Compare all specifications:
| 2009 BMW 320 | 2012 BMW 550 | |
| Make | BMW | BMW |
| Model | 320 | 550 |
| Year Released | 2009 | 2012 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 4400 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 400 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 331 Nm | 609 Nm |
| Torque RPM | 2000 RPM | 1750 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1580 kg | 1980 kg |
| Vehicle Length | 4480 mm | 4899 mm |
| Vehicle Width | 1750 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1464 mm |
| Wheelbase Size | 2730 mm | 2968 mm |
| Fuel Tank Capacity | 63 L | 70 L |
